veazie



@uilen gisten L@einer @fired W. S. COLWELL AND F. VEAZIE. OF PITTSBURG,PENNSYLVANIA.

Letters Patent No. 60,999, dated January 8, 1867.

IMPROVEMENT IN STAVE MACHINES.

'lO ALL WHOM IT MAY CONCERN:

Be it known that we, WILLIAM S. COLWELL and F. VEAZIE, of Pittsburg, inthe county of Allegheny, and State of Pennsylvania, have invented a newand useful Improvement in Stave-Sawing Machine,A and we do herebydeclare the following to be a full and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference-marked thereon.

`Our invention consists in the use of two saws travelling in oppositedirections, and in the use of a feedcarriage provided with clamping jawsfor holding the timber firm, said saws, carriage, clamping ja'ws and'the other parts connected therewith being constructed, arranged, andoperating in the manner hereinafter described.

To enable others slrilledin theY art to make and use our invention, wewill proceed to describe its construction and operation.

In the accompanyingV drawings,vwhich form part of our specication-Figure 1 representen. top View of our improved stave-sawing machine.

Figure 2 represents a front elevation of the same.

Figure 3 represents a side view of the feed-carriage of our improvedstave-sawing machine.

Figure I represents an end view of our improved stave-sawing machine.

Figure 5 represents .a side view of the rocking arm to which the sawsare attached.

Figure represents a perspective view `of a part which we use for afoot-brace and journal bearing.

Figure 7 represents a perspective view of the guide we use for theguides of the clamping jaws.

Figure 8 represents the guides and supports of the clamping jaws. Y

Figure 9 represents a transverse section of the endless screw used foroperating the clamping jaws e and f.

Figure 10 represents an end view of the ratchet-lever used for operatingthe clamping jaws g and L.

Figure 1l represents a side view of .the ratchet-lever referred to infig. 10.-

In the drawings, in which similar letters and figures of reference referto similar parts- A reprcsentsthe frame of the machineg-i'which framemaybe made of wood or iron, or wood and iron coinbined. The manner andmeans of constructing the frame we leave to the judgment and skill ofthe mechanic. The frame A is provided with a feed-carriage, '/L, whichis provided with friction-wheels, s and l0; the friction wheels s areprovided with grooves, and run between two rails, x and x3. To the underside of the carriage n is attached rack m4, into which gears an endlessscrew, w1 -on the shaitzz, (as indicated by dotted lines in iig. Thebearings of the shaft x2 are in the end of the frame A and leverl22, andso arranged that by raising said lover the endless screw will be throwninto gear with the rack xt, and by lowering the lever the endless Screw`is unshippcd from the rack x4. On the upper side of l the feed-carriagem. are placed two guides 'D and D', the form of which is clearly shownin g. 7. In these guides are placed guides and supports for theclampingjaws e, f, g, and h; the forni of these guides or supports isshown in iig. 8. They areprovided with anges, 20, for holding andguiding them properly in the guides D and D. The clamping jaws areplaced'in the opening 15, (see lig. 8,) and part marked 16 is used for abearing for shaft P, on the end of which are placed wheels, 30, whichgear into the racks w of the guides D and D. The clamping jaw e is.provided with a rack, o', which gears into the endless screw t', whichmoves longitudinally on the shaft 11, and is rerolvcd'with the shaft bymeans of what is termed a feather, which is tted in a groove in theshaft, which is also fitted to a groove made in the endless screw, asshown in iig. 9. The clamping jawfis provided with an arm, J, on the endof which is a pin, 9, which is fitted in a groove, y, in the endlessscrew i. By thus connecting the arm J oi' the. clamping jawf and therack o of the clampingjaw e with the endless screw i, the jaws e and fcan be made to move towa'rds or recede from each other in accordancewith the motion given to the endless screw i; that is to say, by turningthe endless screw in one.direction the jaws will recede from each other,and by turning it in theopposite direction the jaws will move towardseach other. The clamping'jaw 71. is provided with a' lever, Z, on theend of which is atongue, 8; the position and form of this tongue on theend ofthe lever are clearly shown in. iig. 10. The tongue 8 ofthe leverZ gears into the rack m on the end of the arm k of the clamping jaw g.By thus connecting the lever Zto the clamping jaw h, and gearing thetongue 8 of .'the lever Zinto the rack m on the end -of the arm c of theclamping jaw g, the jawsg and L can be moved towards or from each otherby moving theflever l in the desired direction for obtaining the motiondesired of the jaws. On the end of the shaft P is placed a lever, u, towhich' is attached a pawl, t, which isused in"\ connection with thelever u' for revolving the wheels 30, which are permanently secured onthe shaft P. i The 'paw'l tis placed inbetween the cogs of the wheelnext to the lever, and by operating the lever the wheels 30 and shaft Pcan be revolved, vwhich will move the clamping jaws g and 7LA towards orback from the saws A andvB, in accordance with the way wheels 30 areturned.4 By this arrangement ofthe clamping jaws g and z, and the mannerof movingythem towardsand from each other, and bythe-means for movingthem towards the saws, timber of any sizeor form (suitable for Steves)can beY firmly held between the clamping jaws and sa-wed entirely upinto staves. The shaft 17, which has .its bearings in the partsmarked 24and'O, is-provided with pulleys, 21 and 26, and aldisk, 7, to which issecured what is termed a compound or double crank, fto which areconnectedrods 5 and 6, which are attached to the lower ends of the saw.arms Tand 2*.. The sawarm 2 is permanently 'secured on the shaft 3,which has its bearings in the parts marked o. The saw arm 1 is loose,andis oscillate'd on the shaft 3. Motion is imparted to thefeed-carriage'n through. themedinm .ofthe pulleys` 21 andl28 andthe belty. From the above description, and by reference to the accompanyingdrawings; theskillfulrmechanic will readily understand the constructionand arrangement ef the several parts :of our improved stave-sawingmachine, and the relation that these parts bear to eachother. We will,therefore,:proceedvat once-to describe its operation, which is asfollows: i

Having the tiniber'cut into suitable lengths *for staves, it is thenplaced between the clamping jaws g and h, and firmly securedby forcingthe jaws against -the ends of the timbers through the medium of thelever `Z and rack m. 'lhetiniberis then brouglit'in line with saws A and3B for making-the desired cut. The clamping jaws e and j' are thenforced up against the timber through the medium of the hand-wheel R,bevelled wheels 12 and 1.3, and the-endless screw 2'; motion is thenimparted to the shaft 13, which will -im'part motion to the sawsk AandWB and to pulley '21, which, through themedium of belt y', willimpart motion to the shaft 2:2, which will impart motion 'to thefeed-carriagen, (when the endless screw :v1 is thrown in gear with therack :n4 onthe underk side of the carriageglwhich will feed the timberup to the saws A. and B, which will travel in opposite directions,

and cut two staves at one operation.

Having thus described the nature, construction, and operation of ourimprovement, what we claim as our invention, is-

1. The arrangement of the saws A and B, arms Il. and 2, shaft 3,connecting-rods 5 and 6, and crank4,

v hen said arrangementis vused forI sawing out .the concave and convexsidesoi` arstave atrone operation, as herein described.

2. The arrangement of the guides D .and D', clamps e, f, g, and z,(provided with arms J and K,) rack m, lever Z, endless screw c',andwheels 12 and 13, when said parts are arranged and operating asherein described and for the purpose set forth.

3. The arrangement of the .racks w,- wheels 30, shaft P, lever u,provided with pawl t, when said parts are used in connection withtheclamps e, f, g, and t, as herein described and for t'he purpose setforth.

l W. S. COLWELL,

F. VEAZIE.

Witnesses.: JAMES J. JOHNSTON, JAMES MeBRIDn.

